Support of wideband physical resource group (prg) in long term evolution (lte)

ABSTRACT

In an aspect, a method of wireless communication includes receiving, by a user equipment (UE), downlink control information (DCI) having a resource allocation of allocated physical resource blocks (PRBs). The method additionally includes employing at least one of a) a wideband decoder, b) a wideband channel estimator, c) a bandwidth-specific decoder, or d) a bandwidth-specific channel estimator for wireless communications based at least on a feature of the resource allocation in the DCI. In other aspects a UE transmits, to a base station, an indication of UE capabilities regarding support of wideband physical resource group (PRG) for various transmission time interval (TTI) durations.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/671,053, entitled, “SUPPORT OF WIDEBAND PHYSICAL RESOURCE GROUP (PRG)IN LONG TERM EVOLUTION (LTE),” filed Oct. 31, 2019, and claims thebenefit of Greece Provisional Patent Application No. 20180100502,entitled, “SUPPORT OF WIDEBAND PHYSICAL RESOURCE GROUP (PRG) IN LONGTERM EVOLUTION (LTE),” filed on Nov. 2, 2018, which is expresslyincorporated by reference herein in its entirety.

TECHNICAL FIELD

Aspects of the present disclosure relate generally to wirelesscommunication systems, and more particularly, to support of widebandphysical resource group (PRG) in long term evolution (LTE).

INTRODUCTION

Wireless communication networks are widely deployed to provide variouscommunication services such as voice, video, packet data, messaging,broadcast, and the like. These wireless networks may be multiple-accessnetworks capable of supporting multiple users by sharing the availablenetwork resources. Such networks, which are usually multiple accessnetworks, support communications for multiple users by sharing theavailable network resources.

A wireless communication network may include a number of base stationsor node Bs that can support communication for a number of userequipments (UEs). A UE may communicate with a base station via downlinkand uplink. The downlink (or forward link) refers to the communicationlink from the base station to the UE, and the uplink (or reverse link)refers to the communication link from the UE to the base station.

A base station may transmit data and control information on the downlinkto a UE and/or may receive data and control information on the uplinkfrom the UE. On the downlink, a transmission from the base station mayencounter interference due to transmissions from neighbor base stationsor from other wireless radio frequency (RF) transmitters. On the uplink,a transmission from the UE may encounter interference from uplinktransmissions of other UEs communicating with the neighbor base stationsor from other wireless RF transmitters. This interference may degradeperformance on both the downlink and uplink.

As the demand for mobile broadband access continues to increase, thepossibilities of interference and congested networks grows with more UEsaccessing the long-range wireless communication networks and moreshort-range wireless systems being deployed in communities. Research anddevelopment continue to advance wireless communication technologies notonly to meet the growing demand for mobile broadband access, but toadvance and enhance the user experience with mobile communications.

BRIEF SUMMARY OF SOME EMBODIMENTS

The following summarizes some aspects of the present disclosure toprovide a basic understanding of the discussed technology. This summaryis not an extensive overview of all contemplated features of thedisclosure, and is intended neither to identify key or critical elementsof all aspects of the disclosure nor to delineate the scope of any orall aspects of the disclosure. Its sole purpose is to present someconcepts of one or more aspects of the disclosure in summary form as aprelude to the more detailed description that is presented later.

In an aspect, a method of wireless communication includes receiving, bya user equipment (UE), downlink control information (DCI) having aresource allocation of allocated physical resource blocks (PRBs). Themethod additionally includes employing at least one of a) a widebanddecoder, b) a wideband channel estimator, c) a bandwidth-specificdecoder, or d) a bandwidth-specific channel estimator for wirelesscommunications based at least on a feature of the resource allocation inthe DCI.

In another aspect, a method of wireless communication includestransmitting, by a user equipment (UE) to a base station, an indicationof UE capabilities. The UE capabilities may be regarding whether the UEcan support wideband physical resource groups (PRGs) in transmissiontime intervals (TTIs) having durations of one millisecond (1 ms) ormore. Alternatively or additionally, the UE capabilities may beregarding whether the UE can support wideband PRGs in short TTIs havingdurations of less than 1 ms. Alternatively or additionally, the UEcapabilities may be regarding whether the UE can support simultaneouswideband PRGs in TTIs having durations of 1 ms or more and wideband PRGsin short TTIs having durations of less than 1 ms. The methodadditionally includes receiving a configuration, by the UE from the basestation, to perform wireless communications in wideband mode for a givenTTI.

In another aspect, a method of wireless communication includesreceiving, by a base station from a user equipment (UE), an indicationof UE capabilities. The UE capabilities may be regarding whether the UEcan support wideband physical resource groups (PRGs) in transmissiontime intervals (TTIs) having durations of one millisecond (1 ms) ormore. Alternatively or additionally, the UE capabilities may beregarding whether the UE can support wideband PRGs in short TTIs havingdurations of less than 1 ms. Alternatively or additionally, the UEcapabilities may be regarding whether the UE can support simultaneouswideband PRGs in TTIs having durations of 1 ms or more and wideband PRGsin short TTIs having durations of less than 1 ms. The methodadditionally includes configuring the UE, by the base station, toperform wireless communications in wideband mode for a given TTI basedat least on the indication of UE capabilities.

In another aspect, an apparatus of wireless communication has means forreceiving, by a user equipment (UE), downlink control information (DCI)having a resource allocation of allocated physical resource blocks(PRBs). The apparatus additionally has means for employing at least oneof a) a wideband decoder, b) a wideband channel estimator, c) abandwidth-specific decoder, or d) a bandwidth-specific channel estimatorfor wireless communications based at least on a feature of the resourceallocation in the DCI.

In another aspect, an apparatus of wireless communication has means fortransmitting, by a user equipment (UE) to a base station, an indicationof UE capabilities. The UE capabilities may be regarding whether the UEcan support wideband physical resource groups (PRGs) in transmissiontime intervals (TTIs) having durations of one millisecond (1 ms) ormore. Alternatively or additionally, the UE capabilities may beregarding whether the UE can support wideband PRGs in short TTIs havingdurations of less than 1 ms. Alternatively or additionally, the UEcapabilities may be regarding whether the UE can support simultaneouswideband PRGs in TTIs having durations of 1 ms or more and wideband PRGsin short TTIs having durations of less than 1 ms. The apparatus also hasmeans for receiving a configuration, by the UE from the base station, toperform wireless communications in wideband mode for a given TTI.

In another aspect, an apparatus of wireless communication has means forreceiving, by a base station from a user equipment (UE), an indicationof UE capabilities. The UE capabilities may be regarding whether the UEcan support wideband physical resource groups (PRGs) in transmissiontime intervals (TTIs) having durations of one millisecond (1 ms) ormore. Alternatively or additionally, the UE capabilities may beregarding whether the UE can support wideband PRGs in short TTIs havingdurations of less than 1 ms. Alternatively or additionally, the UEcapabilities may be regarding whether the UE can support simultaneouswideband PRGs in TTIs having durations of 1 ms or more and wideband PRGsin short TTIs having durations of less than 1 ms. The apparatusadditionally has means for configuring the UE, by the base station, toperform wireless communications in wideband mode for a given TTI basedat least on the indication of UE capabilities.

In another aspect, a non-transitory computer-readable medium has programcode recorded thereon, including program code executable by a computerfor causing the computer to receive, by a user equipment (UE), downlinkcontrol information (DCI) having a resource allocation of allocatedphysical resource blocks (PRBs). The program code additionally includesprogram code executable by the computer for causing the computer toemploy at least one of a) a wideband decoder, b) a wideband channelestimator, c) a bandwidth-specific decoder, or d) a bandwidth-specificchannel estimator for wireless communications based at least on afeature of the resource allocation in the DCI.

In another aspect, a non-transitory computer-readable medium has programcode recorded thereon, including program code executable by the computerfor causing the computer to transmit, by a user equipment (UE) to a basestation, an indication of UE capabilities. The UE capabilities may beregarding whether the UE can support wideband physical resource groups(PRGs) in transmission time intervals (TTIs) having durations of onemillisecond (1 ms) or more. Alternatively or additionally, the UEcapabilities may be regarding whether the UE can support wideband PRGsin short TTIs having durations of less than 1 ms. Alternatively oradditionally, the UE capabilities may be regarding whether the UE cansupport simultaneous wideband PRGs in TTIs having durations of 1 ms ormore and wideband PRGs in short TTIs having durations of less than 1 ms.The program code additionally includes program code executable by thecomputer to receive a configuration, by the UE from the base station, toperform wireless communications in wideband mode for a given TTI.

In another aspect, a non-transitory computer-readable medium havingprogram code recorded thereon, including program code executable by thecomputer for causing the computer to receive, by a base station from auser equipment (UE), an indication of UE capabilities. The UEcapabilities may be regarding whether the UE can support widebandphysical resource groups (PRGs) in transmission time intervals (TTIs)having durations of one millisecond (1 ms) or more. Alternatively oradditionally, the UE capabilities may be regarding whether the UE cansupport wideband PRGs in short TTIs having durations of less than 1 ms.Alternatively or additionally, the UE capabilities may be regardingwhether the UE can support simultaneous wideband PRGs in TTIs havingdurations of 1 ms or more and wideband PRGs in short TTIs havingdurations of less than 1 ms. The program code additionally includesprogram code executable by the computer for causing the computer toconfigure the UE, by the base station, to perform wirelesscommunications in wideband mode for a given TTI based at least on theindication of UE capabilities.

In another aspect, an apparatus configured for wireless communicationhas at least one processor and a memory coupled to the at least oneprocessor. The at least one processor is configured to receive, by auser equipment (UE), downlink control information (DCI) having aresource allocation of allocated physical resource blocks (PRBs). The atleast one processor is additionally configured to employ at least one ofa) a wideband decoder, b) a wideband channel estimator, c) abandwidth-specific decoder, or d) a bandwidth-specific channel estimatorfor wireless communications based at least on a feature of the resourceallocation in the DCI.

In another aspect, an apparatus configured for wireless communicationhas at least one processor and a memory coupled to the at least oneprocessor. The at least one processor is configured to transmit, by auser equipment (UE) to a base station, an indication of UE capabilities.The UE capabilities may be regarding whether the UE can support widebandphysical resource groups (PRGs) in transmission time intervals (TTIs)having durations of one millisecond (1 ms) or more. Alternatively oradditionally, the UE capabilities may be regarding whether the UE cansupport wideband PRGs in short TTIs having durations of less than 1 ms.Alternatively or additionally, the UE capabilities may be regardingwhether the UE can support simultaneous wideband PRGs in TTIs havingdurations of 1 ms or more and wideband PRGs in short TTIs havingdurations of less than 1 ms. The at least one processor is additionallyconfigured to receive a configuration, by the UE from the base station,to perform wireless communications in wideband mode for a given TTI.

In another aspect, an apparatus configured for wireless communicationhas at least one processor and a memory coupled to the at least oneprocessor. The at least one processor is configured to receive, by abase station from a user equipment (UE), an indication of UEcapabilities. The UE capabilities may be regarding whether the UE cansupport wideband physical resource groups (PRGs) in transmission timeintervals (TTIs) having durations of one millisecond (1 ms) or more.Alternatively or additionally, the UE capabilities may be regardingwhether the UE can support wideband PRGs in short TTIs having durationsof less than 1 ms. Alternatively or additionally, the UE capabilitiesmay be regarding whether the UE can support simultaneous wideband PRGsin TTIs having durations of 1 ms or more and wideband PRGs in short TTIshaving durations of less than 1 ms. The at least one processor isadditionally configured to configure the UE, by the base station, toperform wireless communications in wideband mode for a given TTI basedat least on the indication of UE capabilities.

Other aspects, features, and embodiments of the present invention willbecome apparent to those of ordinary skill in the art, upon reviewingthe following description of specific, exemplary embodiments of thepresent invention in conjunction with the accompanying figures. Whilefeatures of the present invention may be discussed relative to certainembodiments and figures below, all embodiments of the present inventioncan include one or more of the advantageous features discussed herein.In other words, while one or more embodiments may be discussed as havingcertain advantageous features, one or more of such features may also beused in accordance with the various embodiments of the inventiondiscussed herein. In similar fashion, while exemplary embodiments may bediscussed below as device, system, or method embodiments it should beunderstood that such exemplary embodiments can be implemented in variousdevices, systems, and methods.

BRIEF DESCRIPTION OF THE DRAWINGS

A further understanding of the nature and advantages of the presentdisclosure may be realized by reference to the following drawings. Inthe appended figures, similar components or features may have the samereference label. Further, various components of the same type may bedistinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label.

FIG. 1 is a block diagram illustrating details of a wirelesscommunication system according to some embodiments of the presentdisclosure.

FIG. 2 is a block diagram conceptually illustrating a design of a basestation/gNB and a UE configured according to some embodiments of thepresent disclosure.

FIG. 3A is a block diagram illustrating example blocks of a wirelesscommunication process carried out by a UE according to some embodimentsof the present disclosure.

FIG. 3B is a block diagram illustrating example blocks of a wirelesscommunication process carried out by a UE according to some embodimentsof the present disclosure.

FIG. 4A is a block diagram illustrating example blocks of a wirelesscommunication process carried out by a UE according to some embodimentsof the present disclosure.

FIG. 4B is a block diagram illustrating example blocks of a wirelesscommunication process carried out by a base station according to someembodiments of the present disclosure.

FIG. 5 is a block diagram conceptually illustrating a design of a UEconfigured to carry out wireless communications according to someembodiments of the present disclosure.

FIG. 6 is a block diagram conceptually illustrating a design of a UEconfigured to carry out wireless communications according to someembodiments of the present disclosure.

FIG. 7 is a block diagram conceptually illustrating a design of a basestation configured to carry out wireless communications according tosome embodiments of the present disclosure.

DETAILED DESCRIPTION

The detailed description set forth below, in connection with theappended drawings, is intended as a description of various possibleconfigurations and is not intended to limit the scope of the disclosure.Rather, the detailed description includes specific details for thepurpose of providing a thorough understanding of the inventive subjectmatter. It will be apparent to those skilled in the art that thesespecific details are not required in every case and that, in someinstances, well-known structures and components are shown in blockdiagram form for clarity of presentation.

This disclosure relates generally to providing or participating incommunication as between two or more wireless devices in one or morewireless communications systems, also referred to as wirelesscommunications networks. In various embodiments, the techniques andapparatus may be used for wireless communication networks such as codedivision multiple access (CDMA) networks, time division multiple access(TDMA) networks, frequency division multiple access (FDMA) networks,orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA)networks, long term evolution (LTE) networks, Global System for MobileCommunications (GSM) networks, as well as other communications networks.As described herein, the terms “networks” and “systems” may be usedinterchangeably according to the particular context.

A CDMA network, for example, may implement a radio technology such asuniversal terrestrial radio access (UTRA), cdma2000, and the like. UTRAincludes wideband-CDMA (W-CDMA) and low chip rate (LCR). CDMA2000 coversIS-2000, IS-95, and IS-856 standards.

A TDMA network may, for example implement a radio technology such asGSM. 3GPP defines standards for the GSM EDGE (enhanced data rates forGSM evolution) radio access network (RAN), also denoted as GERAN. GERANis the radio component of GSM/EDGE, together with the network that joinsthe base stations (for example, the Ater and Abis interfaces) and thebase station controllers (A interfaces, etc.). The radio access networkrepresents a component of a GSM network, through which phone calls andpacket data are routed from and to the public switched telephone network(PSTN) and Internet to and from subscriber handsets, also known as userterminals or user equipments (UEs). A mobile phone operator's networkmay comprise one or more GERANs, which may be coupled with UniversalTerrestrial Radio Access Networks (UTRANs) in the case of a UMTS/GSMnetwork. An operator network may also include one or more LTE networks,and/or one or more other networks. The various different network typesmay use different radio access technologies (RATs) and radio accessnetworks (RANs).

An OFDMA network may, for example, implement a radio technology such asevolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers(IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like. UTRA,E-UTRA, and GSM are part of universal mobile telecommunication system(UMTS). In particular, LTE is a release of UMTS that uses E-UTRA. UTRA,E-UTRA, GSM, UMTS and LTE are described in documents provided from anorganization named “3rd Generation Partnership Project” (3GPP), andcdma2000 is described in documents from an organization named “3rdGeneration Partnership Project 2” (3GPP2). These various radiotechnologies and standards are known or are being developed. Forexample, the 3rd Generation Partnership Project (3GPP) is acollaboration between groups of telecommunications associations thataims to define a globally applicable third generation (3G) mobile phonespecification. 3GPP long term evolution (LTE) is a 3GPP project aimed atimproving the universal mobile telecommunications system (UMTS) mobilephone standard. The 3GPP may define specifications for the nextgeneration of mobile networks, mobile systems, and mobile devices.

For clarity, certain aspects of the apparatus and techniques may bedescribed below with reference to exemplary LTE implementations or in anLTE-centric way, and LTE terminology may be used as illustrativeexamples in portions of the description below; however, the descriptionis not intended to be limited to LTE applications. Indeed, the presentdisclosure is concerned with shared access to wireless spectrum betweennetworks using different radio access technologies or radio airinterfaces.

Moreover, it should be understood that, in operation, wirelesscommunication networks adapted according to the concepts herein mayoperate with any combination of licensed or unlicensed spectrumdepending on loading and availability. Accordingly, it will be apparentto one of skill in the art that the systems, apparatus and methodsdescribed herein may be applied to other communications systems andapplications than the particular examples provided.

While aspects and embodiments are described in this application byillustration to some examples, those skilled in the art will understandthat additional implementations and use cases may come about in manydifferent arrangements and scenarios. Innovations described herein maybe implemented across many differing platform types, devices, systems,shapes, sizes, packaging arrangements. For example, embodiments and/oruses may come about via integrated chip embodiments and/or othernon-module-component based devices (e.g., end-user devices, vehicles,communication devices, computing devices, industrial equipment,retail/purchasing devices, medical devices, AI-enabled devices, etc.).While some examples may or may not be specifically directed to use casesor applications, a wide assortment of applicability of describedinnovations may occur. Implementations may range from chip-level ormodular components to non-modular, non-chip-level implementations andfurther to aggregated, distributed, or original equipment manufacturer(OEM) devices or systems incorporating one or more described aspects. Insome practical settings, devices incorporating described aspects andfeatures may also necessarily include additional components and featuresfor implementation and practice of claimed and described embodiments. Itis intended that innovations described herein may be practiced in a widevariety of implementations, including both large/small devices,chip-level components, multi-component systems (e.g. RF-chain,communication interface, processor), distributed arrangements, end-userdevices, etc. of varying sizes, shapes, and constitution.

FIG. 1 shows wireless network 100 for communication according to someembodiments. While discussion of the technology of this disclosure isprovided relative to an LTE-A network (shown in FIG. 1), this is forillustrative purposes. Principles of the technology disclosed can beused in other network deployments, including fifth generation (5G)networks. As appreciated by those skilled in the art, componentsappearing in FIG. 1 are likely to have related counterparts in othernetwork arrangements including, for example, cellular-style networkarrangements and non-cellular-style-network arrangements (e.g., deviceto device or peer to peer or ad hoc network arrangements, etc.).

Turning back to FIG. 1 wireless network 100 includes a number of basestations, such as may comprise evolved node Bs (eNBs) or G node Bs(gNBs). These may be referred to as gNBs 105. A gNB may be a stationthat communicates with the UEs and may also be referred to as a basestation, a node B, an access point, and the like. Each gNB 105 mayprovide communication coverage for a particular geographic area. In3GPP, the term “cell” can refer to this particular geographic coveragearea of a gNB and/or a gNB subsystem serving the coverage area,depending on the context in which the term is used. In implementationsof wireless network 100 herein, gNBs 105 may be associated with a sameoperator or different operators (e.g., wireless network 100 may comprisea plurality of operator wireless networks), and may provide wirelesscommunications using one or more of the same frequencies (e.g., one ormore frequency band in licensed spectrum, unlicensed spectrum, or acombination thereof) as a neighboring cell.

A gNB may provide communication coverage for a macro cell or a smallcell, such as a pico cell or a femto cell, and/or other types of cell. Amacro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by UEswith service subscriptions with the network provider. A small cell, suchas a pico cell, would generally cover a relatively smaller geographicarea and may allow unrestricted access by UEs with service subscriptionswith the network provider. A small cell, such as a femto cell, wouldalso generally cover a relatively small geographic area (e.g., a home)and, in addition to unrestricted access, may also provide restrictedaccess by UEs having an association with the femto cell (e.g., UEs in aclosed subscriber group (CSG), UEs for users in the home, and the like).A gNB for a macro cell may be referred to as a macro gNB. A gNB for asmall cell may be referred to as a small cell gNB, a pico gNB, a femtogNB or a home gNB. In the example shown in FIG. 1, gNBs 105 a, 105 b and105 c are macro gNBs for the macro cells 110 a, 110 b and 110 c,respectively. gNBs 105 x, 105 y, and 105 z are small cell gNBs, whichmay include pico or femto gNBs that provide service to small cells 110x, 110 y, and 110 z, respectively. A gNB may support one or multiple(e.g., two, three, four, and the like) cells.

Wireless network 100 may support synchronous or asynchronous operation.For synchronous operation, the gNBs may have similar frame timing, andtransmissions from different gNBs may be approximately aligned in time.For asynchronous operation, the gNBs may have different frame timing,and transmissions from different gNBs may not be aligned in time. Insome scenarios, networks may be enabled or configured to handle dynamicswitching between synchronous or asynchronous operations.

UEs 115 are dispersed throughout wireless network 100, and each UE maybe stationary or mobile. It should be appreciated that, although amobile apparatus is commonly referred to as user equipment (UE) instandards and specifications promulgated by the 3rd GenerationPartnership Project (3GPP), such apparatus may also be referred to bythose skilled in the art as a mobile station (MS), a subscriber station,a mobile unit, a subscriber unit, a wireless unit, a remote unit, amobile device, a wireless device, a wireless communications device, aremote device, a mobile subscriber station, an access terminal (AT), amobile terminal, a wireless terminal, a remote terminal, a handset, aterminal, a user agent, a mobile client, a client, or some othersuitable terminology. Within the present document, a “mobile” apparatusor UE need not necessarily have a capability to move, and may bestationary. Some non-limiting examples of a mobile apparatus, such asmay comprise embodiments of one or more of UEs 115, include a mobile, acellular (cell) phone, a smart phone, a session initiation protocol(SIP) phone, a laptop, a personal computer (PC), a notebook, a netbook,a smart book, a tablet, and a personal digital assistant (PDA). A mobileapparatus may additionally be an “Internet of things” (IoT) device suchas an automotive or other transportation vehicle, a satellite radio, aglobal positioning system (GPS) device, a logistics controller, a drone,a multi-copter, a quad-copter, a smart energy or security device, asolar panel or solar array, municipal lighting, water, or otherinfrastructure; industrial automation and enterprise devices; consumerand wearable devices, such as eyewear, a wearable camera, a smart watch,a health or fitness tracker, a mammal implantable device, gesturetracking device, medical device, a digital audio player (e.g., MP3player), a camera, a game console, etc.; and digital home or smart homedevices such as a home audio, video, and multimedia device, anappliance, a sensor, a vending machine, intelligent lighting, a homesecurity system, a smart meter, etc. A mobile apparatus, such as UEs115, may be able to communicate with macro gNBs, pico gNBs, femto gNBs,relays, and the like. In FIG. 1, a lightning bolt (e.g., communicationlinks 125) indicates wireless transmissions between a UE and a servinggNB, which is a gNB designated to serve the UE on the downlink and/oruplink, or desired transmission between gNBs. Although backhaulcommunication 134 is illustrated as wired backhaul communications thatmay occur between gNB s, it should be appreciated that backhaulcommunications may additionally or alternatively be provided by wirelesscommunications.

FIG. 2 shows a block diagram of a design of base station/gNB 105 and UE115. These can be one of the base stations/gNBs and one of the UEs inFIG. 1. For a restricted association scenario (as mentioned above), thegNB 105 may be small cell gNB 105 z in FIG. 1, and UE 115 may be UE 115z, which in order to access small cell gNB 105 z, would be included in alist of accessible UEs for small cell gNB 105 z. gNB 105 may also be abase station of some other type. gNB 105 may be equipped with antennas234 a through 234 t, and UE 115 may be equipped with antennas 252 athrough 252 r.

At gNB 105, transmit processor 220 may receive data from data source 212and control information from controller/processor 240. The controlinformation may be for the physical broadcast channel (PBCH), physicalcontrol format indicator channel (PCFICH), physical hybrid-ARQ indicatorchannel) PHICH, physical downlink control channel (PDCCH), etc. The datamay be for the physical downlink shared channel (PDSCH), etc. Transmitprocessor 220 may process (e.g., encode and symbol map) the data andcontrol information to obtain data symbols and control symbols,respectively. Transmit processor 220 may also generate referencesymbols, e.g., for the primary synchronization signal (PSS), secondarysynchronization signal (SSS), and cell-specific reference signal (CRS).Transmit (TX) multiple-input multiple-output (MIMO) processor 230 mayperform spatial processing (e.g., precoding) on the data symbols, thecontrol symbols, and/or reference symbols, if applicable, and mayprovide output symbol streams to modulators (MODs) 232 a through 232 t.Each modulator 232 may process a respective output symbol stream (e.g.,for orthogonal frequency-division multiplexing (OFDM), etc.) to obtainan output sample stream. Each modulator 232 may additionally oralternatively process (e.g., convert to analog, amplify, filter, andupconvert) the output sample stream to obtain a downlink signal.Downlink signals from modulators 232 a through 232 t may be transmittedvia antennas 234 a through 234 t, respectively.

At UE 115, antennas 252 a through 252 r may receive the downlink signalsfrom gNB 105 and may provide received signals to demodulators (DEMODs)254 a through 254 r, respectively. Each demodulator 254 may condition(e.g., filter, amplify, downconvert, and digitize) a respective receivedsignal to obtain input samples. Each demodulator 254 may further processthe input samples (e.g., for OFDM, etc.) to obtain received symbols.MIMO detector 256 may obtain received symbols from all demodulators 254a through 254 r, perform MIMO detection on the received symbols ifapplicable, and provide detected symbols. Receive processor 258 mayprocess (e.g., demodulate, deinterleave, and decode) the detectedsymbols, provide decoded data for UE 115 to data sink 260, and providedecoded control information to controller/processor 280.

On the uplink, at UE 115, transmit processor 264 may receive and processdata (e.g., for the PUSCH) from data source 262 and control information(e.g., for the PUCCH) from controller/processor 280. Transmit processor264 may also generate reference symbols for a reference signal. Thesymbols from transmit processor 264 may be precoded by TX MIMO processor266 if applicable, further processed by modulators 254 a through 254 r(e.g., for SC-FDM, etc.), and transmitted to gNB 105. At gNB 105, theuplink signals from UE 115 may be received by antennas 234, processed bydemodulators 232, detected by MIMO detector 236 if applicable, andfurther processed by receive processor 238 to obtain decoded data andcontrol information sent by UE 115. Processor 238 may provide thedecoded data to data sink 239 and the decoded control information tocontroller/processor 240.

Controllers/processors 240 and 280 may direct the operation at gNB 105and UE 115, respectively. Controller/processor 240 and/or otherprocessors and modules at gNB 105 and/or controllers/processor 280and/or other processors and modules at UE 115 may perform or direct theexecution of various processes for the techniques described herein, suchas to perform or direct the execution illustrated in FIGS. 3A, 3B, 4A,and 4B, and/or other processes for the techniques described herein.Memories 242 and 282 may store data and program codes for gNB 105 and UE115, respectively. Scheduler 244 may schedule UEs for data transmissionon the downlink and/or uplink.

Recently, interest has arisen regarding indication of wideband physicalresource group (PRG) size so that a UE can use an appropriate decoderand/or channel estimator for wireless communications. For example, useof a higher layer parameter (e.g., RRC parameter, etc.) to indicatewhether the PRG size corresponds to the whole scheduled bandwidth iscurrently under consideration. Also under consideration is an optionalUE capability to indicate whether the UE can support a PRG sizecorresponding to the whole scheduled bandwidth.

In new radio (NR), a similar technique is employed with downlink controlinformation (DCI) signalling. One bit in the DCI indicates if the PRG iswideband. Some conditions apply for setting the bit. For example, theallocation has to be a single cluster of length>N consecutive PRBs, withN being fixed in the NR standard specification.

In long term evolution (LTE), there is no DCI bit that indicates whetherthe PRG bundling corresponds to the whole scheduled bandwidth or less.In some cases (e.g., small allocation, or non-contiguous allocation),the UE cannot perform wideband channel estimation, and there may beperformance loss with respect to allowing the eNB to use multipleprecoders. The present disclosure presents some rules that allow the UEto implicitly determine, based on a resource allocation in a DCI,whether wideband PRG is used. The present disclosure also provides somemechanisms for a UE to indicate its capabilities to support wideband PRGfor different transmission time interval (TTI) durations to a basestation. Accordingly, the present disclosure presents advantageoussolutions to various problems, such as avoiding performance loss in LTEby helping the eNB avoid the use of multiple precoders, and withoutincreasing overhead by adding an explicit indication in DCI of widebandPRG size. Also, UE indication of its capabilities to support widebandPRG for different TTI durations solves a problem relating to complexityat the UE regarding use of shorter TTI durations and/or wideband PRG.Using a shorter TTI duration is more complex at the UE because all ofthe operations are performed more quickly. At the same time, supportingwideband PRG, in general, is more complicated than narrowband PRG.Accordingly, a UE may be able to support wideband PRG for 1 ms TTIdurations but not for shorter TTI durations. Thus, UE indication of itscapabilities to support wideband PRG for different TTI durations alsoavoids performance loss and waste of resources.

In some aspects, a UE assumes wideband PRG size or falls back to abandwidth-specific PRG size depending on one or more features of aresource allocation in DCI (e.g., allocated PRBs). That is, the UEselects a PRG size among a plurality of PRG sizes, for example, awideband PRG and a bandwidth-specific PRG, based on a feature of theresource allocation in the DCI (e.g., whether the resource allocation iscontiguous, almost contiguous, non-contiguous, a small resourceallocation, and/or the like). For example, it is envisioned that the UEmay assume (i.e., select) wideband PRG size if the resource allocationis contiguous and the allocation is more than a predetermined number NPRBs (e.g., N≥10 PRBs). The predetermined number may be set in thestandards or determined and signaled by the network. Alternatively, theUE may assume (or select) wideband PRG size if the resource allocationis almost contiguous.

It is envisioned that the UE may determine that a resource allocation isalmost contiguous if the allocation is for two sets of M1, M2consecutive PRBs that meet two conditions. The first condition is thatthe value of each M1 and M2 is larger than N PRBs (e.g., N≥10 PRBs),with M1 not necessarily being equal to M2. The second condition is thatthere are less than K PRBs between the two sets (e.g., K in the range of1 to 3 PRBs). This proposal may be extended to more sets, (e.g.{M1/M2/M3/M4 . . . }) with less than K PRBs between them. Alternatively,it is envisioned that the UE may determine that a resource allocation isalmost contiguous if the allocation is for a set of M PRBs containedwithin N consecutive PRBs (e.g., M≥X0 and N−M≤X1, and X0≥10, X1≤3).

In some cases, the resource allocation in DCI and the actual PRBs usedfor PDSCH may be different. For example, a physical downlink sharedchannel (PDSCH) may collide with other signals, such as a primarysynchronization signal (PSS), a secondary synchronization signal (SSS),and/or a physical broadcast channel (PBCH). In this case, the eNB canallocate those PRBs and the UE can rate match around the resourcescorresponding to the collision. In dealing with this situation, thereare a couple of alternatives. An advantageous alternative is todetermine PRG size based on actual PDSCH mapping, and this alternativeis advantageous because since it reflects the PRBs that carry thedemodulation reference signals (DMRS), which are used for channelestimation. Another alternative is to determine (or select) PRG sizefrom among a plurality of PRG sizes based on a resource allocation fieldin a DCI.

It is envisioned that the values for a UE to assume (or select) widebandPRG size (e.g., N, M1, M2, K, number of sets, etc.) can be signaled byan eNB (e.g. in broadcast radio resource control (RRC) signaling and/orunicast RRC signaling) or based on UE capability. Demodulation referencesignal (DMRS) density can also change depending on the PRG size. Forexample, for wideband PRG size, the DMRS density can be smaller due tothe presence of smaller edge effect, for example.

The capability and configuration of a UE to support wideband PRG sizecan further be different for different TTI durations (i.e., lengths).For example, a UE may be able to support wideband PRG in 1 ms TTI butnot in a 2 or 3 OFDM symbol (os) short TTI (sTTI). The UE can alsosignal the capability of supporting simultaneous wideband estimation formultiple channels (e.g., sTTI+1 ms TTI).

Turning now to FIG. 3A, a method of wireless communication begins atblock 300. At block 300, the method includes receiving, by a userequipment (UE), downlink control information (DCI) having a resourceallocation of allocated physical resource blocks (PRBs). Processing mayproceed from block 300 to block 302.

At block 302, the method includes an optional selection of a physicalresource group (PRG) size among a wideband PRG and a bandwidth-specificPRG based on a feature of the resource allocation in the DCI. Uponreceiving the DCI, the UE may determine the PRG size by examining afeature the resource allocation of the PRBs. Where the feature indicatesthat the allocated PRBs are contiguous or nearly contiguous, the UE maydetermine the PRG size as wideband. Otherwise, the UE will fall-back toa bandwidth-specific PRG size.

At block 304, the method includes reception of the allocated PRBs basedon the PRG size. Once the PRB size is selected (e.g., a wideband PRG isselected or a bandwidth-specific PRG is selected) based on the featureof the resource allocation received in DCI, the UE can receive theallocated PRBs based on the selected PRG size.

Within the reception of the allocated PRBs at block 304, at block 306,the method includes employing at least one of a) a wideband decoder, b)a wideband channel estimator, c) a bandwidth-specific decoder, or d) abandwidth-specific channel estimator for wireless communications basedat least on a feature of the resource allocation in the DCI. Forexample, it is envisioned that the feature may correspond to theresource allocation being contiguous and the resource allocation beingfor more than a predetermined number N of PRBs. As noted above, thepredetermined number may be set by standards or determined and signaledby the network. Here, it is envisioned that N may be an integer greaterthan or equal to ten PRBs (i.e., N≥10), and/or the predetermined numberN of PRBs may be based on a UE capability. Alternatively, it isenvisioned that the feature may correspond to numbers of PRBs in each oftwo or more sets of PRBs each exceeding a predetermined number N ofPRBs, and one or more numbers of PRBs between each of the two or moresets being less than a predetermined number K of PRBs. Here, it isenvisioned that N may be an integer greater than or equal to ten PRBs(i.e., N≥10), and K may reside within a range of one to three PRBs(i.e., 1≤K≤3). Additionally, it is envisioned that at least one value ofat least one of N or K may be based on a UE capability. Alternatively,it is envisioned that the feature may correspond to the resourceallocation being for a set of an integer M PRBs contained within apredetermined number N of consecutive PRBs. Here, it is envisioned thatthe integer M may be greater than or equal to ten PRBs (i.e., M≥10), anda difference between N and M lies in a range less than or equal to threePRBs (e.g., N−M≤3). Additionally, it is envisioned that at least onevalue of at least one of N, M, or N−M may be based on a UE capability.

Referring now to FIG. 3B, a method of wireless communication includesblocks 352 and 354, which respectively include one or more of thefunctionalities for blocks 300, 302, 304, and 306 (see FIG. 3A), asdetailed above. In addition, the method includes block 350. At block350, the method includes receiving, by the user equipment (UE), a higherlayer configuration. For example, the UE may receive a higher layerconfiguration that includes values for N, M, K, N-M, numbers of sets,etc. In such cases, it is envisioned that the UE may, at block 354,employ at least one of a) a wideband decoder, b) a wideband channelestimator, c) a bandwidth-specific decoder, or d) a bandwidth-specificchannel estimator for wireless communications based at least on afeature of the resource allocation in the DCI, for which the values forN, M, K, N-M, numbers of sets, etc. are based on the higher layerconfiguration by the base station, based on UE capabilities, orcombinations thereof. Alternatively or additionally, block 350 mayinclude receiving a higher layer configuration indicative of use ofwideband PRG. In such cases, it is envisioned that the UE may, at block354, employ at least one of a) a wideband decoder, b) a wideband channelestimator, c) a bandwidth-specific decoder, or d) a bandwidth-specificchannel estimator for wireless communications further based at least onthe higher layer configuration. For example, the UE may, at block 350,receive multiple higher layer configurations indicative of use ofwideband PRG for different TTI lengths. In such cases, it is envisionedthat the UE may, at block 354, employ at least one of a) a widebanddecoder, b) a wideband channel estimator, c) a bandwidth-specificdecoder, or d) a bandwidth-specific channel estimator for wirelesscommunications further based at least on a TTI length associated to theDCI received at block 352.

Turning now to FIG. 4A, a method of wireless communication begins atblock 400. At block 400, the method includes transmitting, by a userequipment (UE) to a base station, an indication of UE capabilities. Forexample, the indication may correspond to an indication whether the UEcan support wideband physical resource groups (PRGs) in transmissiontime intervals (TTIs) having durations of one millisecond (1 ms) ormore. Alternatively or additionally, the indication may correspond to anindication whether the UE can support wideband PRGs in short TTIs havingdurations of less than 1 ms. Alternatively or additionally, theindication may correspond to an indication whether the UE can supportsimultaneous wideband PRGs in TTIs having durations of 1 ms or more andwideband PRGs in short TTIs having durations of less than 1 ms. Forexample, the indication may correspond to an indication that the UE cansupport wideband PRGs in TTIs having durations of 1 ms or more andwideband PRGs in short TTIs having durations of less than 1 ms, but notboth simultaneously. Processing may proceed from block 400 to block 402.

At block 402, the method includes receiving a configuration, by the UEfrom the base station, to perform wireless communications in widebandmode for a given TTI. For example, the base station may configure the UEto perform wireless communications in wideband mode for a TTI having aduration of 1 ms or more, but not for a short TTI having a duration ofless than 1 ms. Alternatively, the base station may configure the UE toperform wireless communications in wideband mode for a TTI having aduration of 1 ms or more and for a short TTI having a duration of lessthan 1 ms, but not both simultaneously. Accordingly, the UE performswireless communication in wideband mode according to the configuration.

Referring now to FIG. 4B, a method of wireless communication begins atblock 450. At block 450, the method includes receiving, by a basestation from a user equipment (UE), an indication of UE capabilities.For example, the indication may correspond to an indication whether theUE can support wideband physical resource groups (PRGs) in transmissiontime intervals (TTIs) having durations of one millisecond (1 ms) ormore. Alternatively or additionally, the indication may correspond to anindication whether the UE can support wideband PRGs in short TTIs havingdurations of less than 1 ms. Alternatively or additionally, theindication may correspond to an indication whether the UE can supportsimultaneous wideband PRGs in TTIs having durations of 1 ms or more andwideband PRGs in short TTIs having durations of less than 1 ms. Forexample, the indication may correspond to an indication that the UE cansupport wideband PRGs in TTIs having durations of 1 ms or more andwideband PRGs in short TTIs having durations of less than 1 ms, but notboth simultaneously. Processing may proceed from block 450 to block 452.

At block 452, the method includes configuring the UE, by the basestation, to perform wireless communications in wideband mode for a givenTTI based at least on the indication of UE capabilities. For example,the base station may configure the UE to perform wireless communicationsin wideband mode for a TTI having a duration of 1 ms or more, but notfor a short TTI having a duration of less than 1 ms. Alternatively, thebase station may configure the UE to perform wireless communications inwideband mode for a TTI having a duration of 1 ms or more and for ashort TTI having a duration of less than 1 ms, but not bothsimultaneously.

Turning now to FIG. 5, a UE 500, such as a UE 115 (see FIG. 2), may havea controller/processor 280, a memory 282, and antennas 252 a through 252r, as described above. UE 500 may also have wireless radios 501 a to 501r that comprise additional components also described above withreference to FIG. 2. The memory 282 of UE 500 stores algorithms thatconfigure processor/controller 280 to carry out procedures as describedabove with reference to FIGS. 3A and 3B.

Algorithms stored by memory 282 configure processor/controller 280 tocarry out procedures relating to wireless communication by the UE 500,as previously described. For example, configuration receiver 502configures controller processor 280 to carry out operations that includereceiving, by the user equipment (UE) 500, a higher layer configurationin any manner previously described, such as in block 350 (see FIG. 3B).Additionally, DCI receiver 503 configures controller processor 280 tocarry out operations that include receiving, by the user equipment (UE)500, downlink control information (DCI) having a resource allocation ofallocated physical resource blocks (PRBs) in any manner previouslydescribed, such as in blocks 300 (see FIG. 3A) and/or 352 (see FIG. B).Also, decoder/estimator employer 504 configures controller processor 280to carry out operations that include employing at least one of a) awideband decoder, b) a wideband channel estimator, c) abandwidth-specific decoder, or d) a bandwidth-specific channel estimatorfor wireless communications based at least on a feature of the resourceallocation in the DCI in any manner previously described, such as inblocks 306 (see FIG. 3A) and/or 354 (see FIG. 3B). It is also understoodthat wideband or band-specific decoders or channel estimators mayadditionally or alternatively be implemented in radio 501 a-r or receiveprocessor 258 with reference to FIG. 2.

Turning now to FIG. 6, a UE 600, such as a UE 115 (see FIG. 2), may havea controller/processor 280, a memory 282, and antennas 252 a through 252r, as described above. UE 600 may also have wireless radios 601 a to 601r that comprise additional components also described above withreference to FIG. 2. The memory 282 of UE 600 stores algorithms thatconfigure processor/controller 280 to carry out procedures as describedabove with reference to FIG. 4A.

Algorithms stored by memory 282 configure processor/controller 280 tocarry out procedures relating to wireless communication by the UE 600,as previously described. For example, indication transmitter 602configures controller processor 280 to carry out operations that includetransmitting, by a user equipment (UE) 600 to a base station, anindication of UE capabilities in any manner previously described, suchas in block 400 (see FIG. 4A). Additionally, configuration receiver 603configures controller processor 280 to carry out operations that includereceiving a configuration, by the UE 600 from the base station, toperform wireless communications in wideband mode for a given TTI in anymanner previously described, such as in blocks 402 (see FIG. 4A). It isalso understood that indication transmitter 602 can additionally oralternatively be implemented in processor 264 where processor 264 and/or280 may then instruct transmission of an indication of the UEcapabilities as discussed above. Furthermore, configuration receiver 603can additionally or alternatively be implemented in receive processor258.

Turning now to FIG. 7, a base station 700, such as a NR-SS base station105 (see FIG. 2), may have a controller/processor 240, a memory 242, andantennas 234 a through 234 t, as described above. The base station 700may also have wireless radios 701 a to 701 t that comprise additionalcomponents also described above with reference to FIG. 2. The memory 242of base station 700 stores algorithms that configureprocessor/controller 240 to carry out procedures as described above withreference to FIG. 4B.

Algorithms stored by memory 242 configure processor/controller 240 tocarry out operations relating to wireless communication by the basestation 700, as previously described. For example, indication receiver702 configures controller processor 240 to carry out operations thatinclude receiving, by the base station 700 from a user equipment (UE),an indication of UE capabilities in any manner previously described,such as in block 450 (see FIG. 4B). Additionally, UE configurator 703configures controller processor 240 to carry out operations that includeconfiguring the UE, by the base station 700, to perform wirelesscommunications in wideband mode for a given TTI based at least on theindication of UE capabilities in any manner previously described, suchas in block 452 (see FIG. 4B)). It is understood that indicationreceiver 702 can additionally or alternatively be implemented in receiveprocessor 238. Furthermore, UE configurator 703 can additionally oralternatively be implemented in transmit processor 230, where transmitprocessor 230 and/or processor 240 may be configured to transmit, orinstruct the transmission of, a configuration instructing or enablingthe UE to perform wireless communications in wideband mode for a givenTTI based at least on the indication of UE capabilities.

Those of skill in the art would understand that information and signalsmay be represented using any of a variety of different technologies andtechniques. For example, data, instructions, commands, information,signals, bits, symbols, and chips that may be referenced throughout theabove description may be represented by voltages, currents,electromagnetic waves, magnetic fields or particles, optical fields orparticles, or any combination thereof.

The functional blocks and modules described herein (e.g., the functionalblocks and modules in FIGS. 2-7) may comprise processors, electronicsdevices, hardware devices, electronics components, logical circuits,memories, software codes, firmware codes, etc., or any combinationthereof.

Those of skill would further appreciate that the various illustrativelogical blocks, modules, circuits, and algorithm steps described inconnection with the disclosure herein may be implemented as electronichardware, computer software, or combinations of both. To clearlyillustrate this interchangeability of hardware and software, variousillustrative components, blocks, modules, circuits, and steps have beendescribed above generally in terms of their functionality. Whether suchfunctionality is implemented as hardware or software depends upon theparticular application and design constraints imposed on the overallsystem. Skilled artisans may implement the described functionality invarying ways for each particular application, but such implementationdecisions should not be interpreted as causing a departure from thescope of the present disclosure. Skilled artisans will also readilyrecognize that the order or combination of components, methods, orinteractions that are described herein are merely examples and that thecomponents, methods, or interactions of the various aspects of thepresent disclosure may be combined or performed in ways other than thoseillustrated and described herein.

The various illustrative logical blocks, modules, and circuits describedin connection with the disclosure herein may be implemented or performedwith a general-purpose processor, a digital signal processor (DSP), anapplication specific integrated circuit (ASIC), a field programmablegate array (FPGA) or other programmable logic device, discrete gate ortransistor logic, discrete hardware components, or any combinationthereof designed to perform the functions described herein. Ageneral-purpose processor may be a microprocessor, but in thealternative, the processor may be any conventional processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices, e.g., a combinationof a DSP and a microprocessor, a plurality of microprocessors, one ormore microprocessors in conjunction with a DSP core, or any other suchconfiguration.

The steps of a method or algorithm described in connection with thedisclosure herein may be embodied directly in hardware, in a softwaremodule executed by a processor, or in a combination of the two. Asoftware module may reside in random access memory (RAM) memory, flashmemory, read-only memory (ROM) memory, erasable programmable read-onlymemory (EPROM) memory, electrically erasable programmable read-onlymemory (EEPROM) memory, registers, hard disk, a removable disk, aCD-ROM, or any other form of storage medium known in the art. Anexemplary storage medium is coupled to the processor such that theprocessor can read information from, and write information to, thestorage medium. In the alternative, the storage medium may be integralto the processor. The processor and the storage medium may reside in anASIC. The ASIC may reside in a user terminal. In the alternative, theprocessor and the storage medium may reside as discrete components in auser terminal.

In one or more exemplary designs, the functions described may beimplemented in hardware, software, firmware, or any combination thereof.If implemented in software, the functions may be stored on ortransmitted over as one or more instructions or code on acomputer-readable medium. Computer-readable media includes both computerstorage media and communication media including any medium thatfacilitates transfer of a computer program from one place to another.Computer-readable storage media may be any available media that can beaccessed by a general purpose or special purpose computer. By way ofexample, and not limitation, such computer-readable media can compriseRAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic diskstorage or other magnetic storage devices, or any other medium that canbe used to carry or store desired program code means in the form ofinstructions or data structures and that can be accessed by ageneral-purpose or special-purpose computer, or a general-purpose orspecial-purpose processor. Also, a connection may be properly termed acomputer-readable medium. For example, if the software is transmittedfrom a website, server, or other remote source using a coaxial cable,fiber optic cable, twisted pair, or digital subscriber line (DSL), thenthe coaxial cable, fiber optic cable, twisted pair, or DSL, are includedin the definition of medium. Disk and disc, as used herein, includescompact disc (CD), laser disc, optical disc, digital versatile disc(DVD), hard disk, solid state disk, and blu-ray disc where disks usuallyreproduce data magnetically, while discs reproduce data optically withlasers. Combinations of the above should also be included within thescope of computer-readable media.

As used herein, including in the claims, the term “and/or,” when used ina list of two or more items, means that any one of the listed items canbe employed by itself, or any combination of two or more of the listeditems can be employed. For example, if a composition is described ascontaining components A, B, and/or C, the composition can contain Aalone; B alone; C alone; A and B in combination; A and C in combination;B and C in combination; or A, B, and C in combination. Also, as usedherein, including in the claims, “or” as used in a list of itemsprefaced by “at least one of” indicates a disjunctive list such that,for example, a list of “at least one of A, B, or C” means A or B or C orAB or AC or BC or ABC (i.e., A and B and C) or any of these in anycombination thereof.

The previous description of the disclosure is provided to enable anyperson skilled in the art to make or use the disclosure. Variousmodifications to the disclosure will be readily apparent to thoseskilled in the art, and the generic principles defined herein may beapplied to other variations without departing from the spirit or scopeof the disclosure. Thus, the disclosure is not intended to be limited tothe examples and designs described herein but is to be accorded thewidest scope consistent with the principles and novel features disclosedherein.

What is claimed is:
 1. A method of wireless communication, the methodcomprising: transmitting, by a user equipment (UE) to a base station, anindication of UE capabilities regarding at least one of: whether the UEcan support wideband physical resource groups (PRGs) in transmissiontime intervals (TTIs) having durations of one millisecond (1 ms) ormore; whether the UE can support wideband PRGs in short TTIs havingdurations of less than 1 ms; or whether the UE can support simultaneouswideband PRGs in TTIs having durations of 1 ms or more and wideband PRGsin short TTIs having durations of less than 1 ms; and receiving aconfiguration, by the UE from the base station, to perform wirelesscommunications in wideband mode for a given TTI.
 2. The method of claim1, wherein the transmitting includes transmitting an indication that theUE can support wideband PRGs in TTIs having durations of 1 ms or moreand wideband PRGs in short TTIs having durations of less than 1 ms, butnot both simultaneously.
 3. A method of wireless communication, themethod comprising: receiving, by a base station from a user equipment(UE), an indication of UE capabilities regarding at least one of:whether the UE can support wideband physical resource groups (PRGs) intransmission time intervals (TTIs) having durations of one millisecond(1 ms) or more; whether the UE can support wideband PRGs in short TTIshaving durations of less than 1 ms; or whether the UE can supportsimultaneous wideband PRGs in TTIs having durations of 1 ms or more andwideband PRGs in short TTIs having durations of less than 1 ms; andconfiguring the UE, by the base station, to perform wirelesscommunications in wideband mode for a given TTI based at least on theindication of UE capabilities.
 4. The method of claim 3, wherein thereceiving includes receiving an indication that the UE can supportwideband PRGs in TTIs having durations of 1 ms or more and wideband PRGsin short TTIs having durations of less than 1 ms, but not bothsimultaneously.